Cooling structure of permanent magnet motor

Abstract

The invention relates to a cooling structure of a permanent magnet motor. The cooling structure comprises a motor shell. In the motor shell, a protective wind-suction plate is positioned at the tail end of the motor shell and plays a role in sucking surrounding cooling air and preventing foreign matters from entering the motor shell; two entrance flow-deflectors are respectively positioned at front and back ends of the motor shell with one entrance flow-deflector positioned at the inner side of the protective wind-suction plate and the other entrance flow-deflector used for sucking cooling air around the motor; a side air-outlet is positioned at one side of the motor shell and is used for discharging heat inside the shell by the use of wind pressure generated in a channel of the motor shell out of the side air-outlet; an air outlet is positioned at the bottom of the motor shell and is used for discharging heat inside the motor shell under the action of wind pressure to ambient air; an annular retainer ring is positioned at the middle position of the motor shell and is used for isolating air mixed-flow between the front and back ends of the motor shell so as to prevent wind pressure from being not generated and reduce airflow loss; and two rotating-parts cover plates are positioned between the two entrance flow-deflectors and are used for fixing a rotor, wherein the two rotating-parts cover plates and fan blades form an integrated structure.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a cooling structure of the permanent magnet motor. Background technique [0002] The permanent magnet motor is used to determine the load, convert electrical energy into mechanical energy, and adopt high-performance permanent magnet excitation, which has the advantages of high speed, wide speed range, high power factor, high efficiency, wide high-efficiency area, and high efficiency under light load. , to achieve energy saving and high efficiency. [0003] The cooling structure of the permanent magnet motor in the prior art is to use an external fan for forced cooling. The main disadvantages are: 1. The surface temperature of the motor shell is high, and the heat generated by the rotor and the stator cannot be transferred well, which reduces the insulation level of the motor and shortens the service life of the motor. Rising 10, 12, 14 ℃, the life of the motor will be halved. [000...

AI Technical Summary

Problems solved by technology

The main disadvantages are: 1. The surface temperature of the motor shell is high, and the heat generated by the rotor and the stator cannot be transferred well, which reduces the insulation level of the motor and shortens the service life of the motor. Rising 10, 12, 14 ℃, the life of the motor will be halved

[0008] 2. The poor cooling effect of the motor will directly affect the winding of the stator, reduce the utilization rate, and even cause burnout

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